Glossary entry (derived from question below)
Portuguese term or phrase:
grandezas pertinentes
English translation:
related physical quantities
Portuguese term
Brazil
Experienced and reliable translator
Native in: Portuguese 
Works in: English to Portuguese, Spanish to Portuguese, Portuguese to English
grandezas pertinentes
| 4 +1 | related physical quantities |
Rodrigo Cayres
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| 4 | and relevant values |
Nick Taylor
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| 3 +1 | relevant magnitudes, relevant amplitudes |
Mario Freitas
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| 3 | related/relevant (parameters and) ratings |
Ana Vozone
|
Proposed translations
Brazil
Engineer, Tech/IT/Aviation/Bus, 15yr
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
related physical quantities
http://en.wikipedia.org/wiki/Physical_quantity
| agree |
Vitor Pinteus
: vd discussion.
11 hrs
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Muito obrigado pela colaboração, Vitor!
|
Portuguese to English, English to Portug
Native in: English
Works in: Portuguese to English, English to Portuguese
and relevant values
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English
relevant magnitudes, relevant amplitudes
| agree |
Nick Taylor
: relevant magnitudes - certo
19 hrs
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Thanks, Nick. I prefer magnitudes as well.
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Will do!
Native in: Portuguese (Variant: European/Portugal)
Works in: English to Portuguese, French to Portuguese, German to Portuguese, and 1 more.
related/relevant (parameters and) ratings
Diode specifications, parameters and ratings - what they mean and how to interpret them when looking at data sheets.
Determine parameters and ratings for RAC and HVAC mechanical services components.
Discussion
6. ("relevant physical quantities" of E=mc2"), 1.820.000: https://www.google.pt/?gfe_rd=cr&ei=tXfDVMmaHYis8wf6xIGgDg&g...
Pelo exposto, creio que estas "grandezas pertinentes" também podem ser "relevant physical quantities".
Por ex., em E=mc^2, as grandezas são Energia, Massa e Velocidade (da luz)(link 3).
Na 2ª Lei de Newton, F=m X a, as grandezas são Força, Massa e Aceleração (links 1, 2 e 3).
vd links:
1. ("Identificar e relacionar as grandezas pertinentes", "Leis de Newton"): http://pesquisa.in.gov.br/imprensa/servlet/INPDFViewer?jorna...
2. ("Leis de Newton", "sendo a massa, o comprimento e o tempo definidos como grandezas fundamentais"): http://pt.wikipedia.org/wiki/Leis_de_Newton
3. ("Segunda Lei de Newton", "as grandezas força e aceleração são diretamente proporcionais"): http://www.mundoeducacao.com/fisica/segunda-lei-newton.htm
3. ("let E, m and c be the physical quantities"): http://www.math.unl.edu/~scohn1/314s10/p1.pdf
4. ("relevant physical quantities"), 1.010.000: https://www.google.pt/?gfe_rd=cr&ei=tXfDVMmaHYis8wf6xIGgDg&g...